PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • While this measure is a step in the right direction, conventional rain sensors do little more than detect moisture and suspend the pending irrigation cycles until the rain sensor no longer detects moisture.Prior art rain sensors rely on a hygroscopic material that expands upon contact with moisture from water vapor, rain, snow, or ice.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com